<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./src/react.js"></script>
    <script src="./src/react-dom.js"></script>
    <script src="./src/babel.js"></script>
</head>
<body>
    <div id="app"></div>
</body>
<script type="text/babel">
    let n =111;
    function fn(){
        n+=1
        console.log(n);
    }
    function Jishuqi(){
        return <div>
            <h1>{n}</h1>
            <button onClick={fn}>点击</button>
            </div>
    }
    ReactDOM.render(
    <Jishuqi></Jishuqi>,
    document.getElementById('app')
    )
</script>
</html>